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CVE-2026-121519— Social Slider Feed <= 2.3.8 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'slidespeed' Parameter

Quick assessment

Affected
themeisle Social Slider Feed – Social Media Feed & Gallery Widgets
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件"Social Slider Feed – Social Media Feed & Gallery Widgets"在 2.3.8 及更早的所有版本中，存在存储型跨站脚本（Stored XSS）漏洞。该漏洞源于对 参数的输入过滤不足以及输出转义缺失。这使得拥有订阅者（Subscriber）及以上权限的已认证攻击者，能够在页面中注入任意 Web 脚本；一旦有用户访问被注入的页面，这些脚本便会执行。 由于 Factory 框架的 调度器中缺少 权限检查，订阅者级别的用户可绕过 能力限制，从而获取

CVSS 6.4 · Medium

Possible ATT&CK Techniques 2 AI

T1055 · Process Injection T1193
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I. Basic Information for CVE-2026-121519

Vulnerability Information
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Vulnerability Title
Social Slider Feed <= 2.3.8 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'slidespeed' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Social Slider Feed – Social Media Feed & Gallery Widgets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'slidespeed' parameter in all versions up to, and including, 2.3.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The missing current_user_can() check in the Factory framework's connect() dispatcher allows Subscriber-level users to bypass the manage_options capability gate and both harvest a valid wis_edit_feed nonce and overwrite any feed's slidespeed setting, after which the stored payload fires on every public pageview embedding the feed shortcode.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
themeisle Social Slider Feed – Social Media Feed & Gallery Widgets 0 ~ 2.3.8 -

II. Public POCs for CVE-2026-121519

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III. Intelligence Information for CVE-2026-121519

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Other References for CVE-2026-121519 (7)

IV. Related Vulnerabilities

Same vendor: themeisle
Same weakness: CWE-79